180
IDE Cable Connector Signals
15 Ground 32 Select Head 1 O
16 Motor Enable 1 O 33 Ground
17 Ground 34 Diskette Change I
Pin Signal Name   I/O Pin Signal Name  I/O
1 Host Reset O 21 No Connection 
2 Ground 22 Ground
3 Host Data 7  I/O 23 Host IOW O
4 Host Data 8  I/O 24 Ground Power
5 Host Data 6  I/O 25  Host IOR O
6 Host Data 9  I/O 26 Ground  Power
7 Host Data 5  I/O 27 I/O Channel Ready  I
8 Host Data 10  I/O 28  No Connection
9 Host Data 4  I/O 29  No Connection 
10 Host Data 11 I/O 30 Ground Power
11 Host Data 3  I/O 31 Host IRQ I
12 Host Data 12 I/O 32 No Connection 
13 Host Data 2  I/O 33 Host A1  O
14 Host Data 13 I/O 34 No Connection 
15 Host Data 1  I/O 35 Host A0  O
16 Host Data 14 I/O 36 Host A2  O
17 Host Data 0  I/O 37 Host CS0 O
18 Host Data 15 I/O 38 Host CS1 O
19 Ground Power 39 ACTIVE ba  I
20 No Connection  40 Ground  Power
Pin  Signal Name I/O Pin  Signal Name I/O